Concrete beam protection.



No. 786,289. PATENTED APR. 4, 1905.

' A. L. A. HIMMBLWRIGHT.

CONCRETE BEAM PROTECTION.

APPLICATION FILED JULY 16, 1.903.

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Ikazi-v l UNITED STATES Patented April 4., 1905.

PATENT OEEICE.

ABRAHAM L. A. HIMMELWRIGHT, OF NEW YORK, N. Y., ASSIGNOR TO THE NEWJERSEY WIRE CLOTH COMPANY, OF TRENTON, NET JERSEY, A

CORPORATION OF NEIV JERSEY.

CONCRETE BEAM PROTECTION.

SPECIFICATION forming part of Letters Patent No. 786,289, dated April 4,1905. Application filed July 16, 1903. Serial No. 165,787.

To all whom it may concern:

Be it known that I, ABRAHAM L. A. HIMMEL- WRIGHT, a citizen ofthe UnitedStates, residing at New York, county of New York, and State of New York,have invented certain new and useful Improvements in Concrete BeamProtection, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

The object of the present invention is to provide an improved fireproofprotection for the under side of beams in concrete floor constructions.It is now common in lireproof buildings to employ a layer of concrete onthe I5 under side of the iron beams, which is filled in with and forms avpart of the floor concrete. It has been found necessary in practice toprovide some means for supporting this layer of concrete, and it hasproven difficult to provide 2O such means which will efficiently supportthe concrete and at the same time permit the concrete to be filled inbelow the beams to the centering in such a manner as to form a solidintegral layer of concrete. I have found that the desired result can besecured by the use of clips on the fianges of the beams provided withportions projecting downward into the layer of concrete and preferablyhooked to give a greater support for the concrete. I have found thatthese clips may be placed at a considerable distance apart, so that theconcrete can readily be worked down under the beam between and aroundthe clips and as there is no metal construction below the beams exceptthese separatedclips a solid continuous body of concrete thoroughlymolded together may readily be formed, so that with such solid integralbody of concrete the separated clips furnish sufiicient support.

The invention will now be described in connection with the accompanyingdrawings, forming a part of this specification, in which a constructionembodying the invention in the preferred form is illustrated, and thefeatures forming the invention will then be specifically pointed out inthe claims.

In the drawings, Figure l is a section of a concrete floor transverselyto the beams and showing the structure complete before removal of thecentering. Fig. 2 is a cross-section of the structure shown in Fig. lwith the centering removed. Fig. 3 is a detail section of the beamprotection and a portion of the floor, showing also the plaster finish.Fig. 4 is a detail view of the form of clip shown in Figs. l to 3. Y

The beams A are the common flanged beams and the floor is shown asconsisting of the ordinary web of concrete B, with bodies of concrete Cextending downward along the webs of the beams and the beam protectionof concrete D extending around and under the bottom flanges of thebeams. The wooden centering E (shown in Fig. l) is the temporary woodencentering used to support the concrete while it is filled in and duringsetting and may be of any suitable construction. Theconcrete protectionD for the lower ianges and bottom of the beams is supported by the clipsF, placed on the beam-fianges at suitable distances, such as to permitthe concrete to be worked under the beam and around the clips in fillingin. These clips F may be of other forms than that shown, but in order tosupport the concrete must be provided with arms n projecting into theconcrete, and these arms are preferably inclined outward or inward andmay be hooked, so as to provide a better support for the concrete. Theform of clip shown will be found very efcient and may be made cheaplyfrom waste bits of metal. These clips consist of narrow metal plates,slit at their opposite ends, so as to provide a pair of arms l, whichare bent upward over the flange of the beams to hold the clip in place,a pair of outwardly-inclined and hooked arms 2 and a pair ofinwardly-inclined and hooked arms 3, which arms 2 3 are embedded in theconcrete and strongly support the latter.

In building the construction shown the temporary centering E is firstput in place, and the concrete protection for the lower iianges andbottom of the beams is first filled in, being worked by any suitabletool down into the space below the beam and around and between. theclips F, so as to form a solid integral body of concrete. A solid bodyol: concrete surrounding and extending about the bottom iianges of thebeams having thus been formed, the upper part C of the concrete aboutthe beams is filled in and the rest of the structure completed as usualin such con struetions. After the concrete is set the temporarycentering' E is removed, and the concrete may then be covered by aplaster iinish Gr, as shown in Fig'. 3, or the concrete may be leltexposed, or a ceiling may be suspended below the beams, according to thecharacter of the structure desired.

l/Vhat 1 claim is4 l. In a concrete Hoor or similar structure,

a beam protection consisting' of a body of con-v crete extending aroundand below the bottom iianges of the beams and supported solely by thebeams and clips arranged at intervals on the flanges and provided witharms extending below the beams and embedded in the concrete,substantially as described.

2. ln a concrete lioor or similar structure, a beam protectionconsisting of a body of concrete extending around and below the bottomflanges of the beams and supported solely by the beams and clipsarranged at intervals on the 'iianges and provided with inclined armsextending' below the beams and embedded in the concrete, substantiallyas described.

3.V ln a concrete ioor or similar structure, a beam protectionconsisting ot a body of concrete extending around and below the bottomflanges oi' the beams and supported solely by the beams and clipsarranged at intervals on the llanges and provided with inclined hookedarms extending below the beams and embedded in the concrete,substantially as described.

It. In a concrete lioor or similarstrueture, a beam protectionconsisting' of a body of concrete extending' around and below the bottomflanges of the beams and supported solely by the beams and clipsarranged at intervals on the iianges and provided with arms some ot'which are inclined downward and outward and others downward and inwardfrom the beam flange and embedded in the concrete, substantially asdescribed.

5. Beam-protection supporting-clip F provided with arms 1 for engagingthe flange of the beam to hold the clip in place, and inclined arms 2, 3on the opposite side of the clip from the arms 1, some of which inclinedarms extend downward and outward and others downward and inward,substantially as described.

6. Beam-protection supporting-clip F provided with arms 1 for engagingthe iiange of the beam to hold the clip in place, and inclined arms 2, 3on the opposite side of the clip from the arms 1, said arms 2, 3 being.hooked at their ends, and some of said arms extending downward andoutward and some downward and inward, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ABRAHAM L. A. lllMllllhhW HGHT.

W itncsses:

C. J. SAWYER, S. VINTHAL.

